Watch-case spring



(No Model.)

N. J. FELIX. WATCH CASE SPRING.

No. 455,437 Patented J My 7, 189 1.

INVE/VTUR Ma. 9 (9W e; ATTORNEY.

UNITED STATES PATENT OFFICE.

NUMA J. FELIX, OF BROOKLYN, NElY YORK.

WATCH-CASE SPRING.

SPECIFICATION forming part of Letters Patent No. 455,437, dated July '7, 1891.

Application filed March 12, 1891. Serial No. 384,717- (No model.)

To all whom it may concern:

Be it known that l, NUMA J. FELIX, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in \Vatch-Oase Springs, of which the following is a specification.

My invention relates to an improvement in watch-case springs, the object being to produce an article of this kind which shall be cheap and durable, and which may be easily and readily inserted in the case-center.

A further object of my invention is to produce a spring which, from its peculiar c011- struction and arrangement of parts, will be self-l0ckingtl1at is, will remain in its proper position within the center without the necessity of pinning it thereto.

\Vith these ends in View my invention consists in certain novel features of construction and arrangement of parts, as will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure l is a plan View of the spring inserted in a watchcase, the center being partially broken away to expose the spring. Fig. 2 is a sectional view taken on the line m 00 of Fig. 1. Fig. 3 is a View taken on the line 11 y of Fig. 1. Fig. 4: is a View showing the lid of the case closed. Fig. 5 is a detached View of the two parts of the spring separated.

A represents a watch-case center made in the ordinary manner, and B the front lid hinged thereto.

O represents that partor portion of the spring usually known or referred to as the lift-spring, made of metal and curved or bent in the form of a semicircle, having a radius slightly larger than that of the case-center, in order that it may fit lightly when inserted in position.

By reference to Fig. 3 of the drawings it will be seen that a portion of the metal is cut away, leaving a narrow strip to joining the two wider portions Z) t, the width of the latter being such as to allow the spring to tit snugly in the case-center. The strip ais bent in the form of an arc of a circle, the metalbeingcut away from the upper and lower edges of the spring to allow of the strip being curved upwardly, as shown, the effect being to make the spring very flexible. The strip (t has centrally formed thereon the lip c, which engages with and raises the lid l3. lVhen the lid is closed the strip a is bent downwardly and in wardly, as shown in Fig. 4, and when released returns to its normal position, as shown in Fig. 3, and raises the lid B. The extreme ends of the part C are slightly bent to form the beveled shoulders e e; or, instead of bending them, small pieces 71 maybe riveted or screwed thereto, as shown in Fig. 5.

D represents that portion of the spring commonly known as the catch-spring, and, like the portion O, is in the form of a semicircle. This portion of the spring is of substantially the same width throughout and snugly fits the center of the case, with the exception of the catch d, made in the ordinary manner, and adapted to engage the lid when in its closed position. The extreme ends of the part D are beveled and fitagainst the beveled ends e e of the part 0, and the spring D, being larger in diameter than the part 0, overlaps its bent ends and effectually locks the two parts in their position, overcoming the necessity of pinning them to the center, as has heretofore been necessary.

My invention is exceedingly simplein construction, can be manufactured at a small cost, and is easily inserted in the case, as the ends of each part may be slightly pressed toward each other, thereby reducing the are and allowing the spring to be readily inserted in place.

Havingfully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A lift-s prin g for watch-cases, constructed with wide ends adapted to fit snugly in said case, and having the metal between said ends cut away from the upper and lower edges thereof, forming the strip a, substantially as described.

2. A watclrcase spring constructed with a lift-spring O and the catch-spring D, said liftspring being constructed with wide ends adapted to fit snugly in the case-center, and having the metal between said ends cut away from its upper and lower edges, forming a strip a, the latter being provided with a lip c, substantially as described.

3. Alift-springt'orawatch-case,constructed with wide ends and having the metal between said ends cut away from the upper andlower edges thereof, forming a narrow arc-shaped strip a, having its upper edge in a horizontal plane with the upper edges of said wide ends, said strip being provided with thelip c, to engage the lid, substantially as described.

4. The watch-case spring made of two parts of unequal diameters, one of said parts being provided with wide ends,and having the metal between said ends cut away, forming the strip a, the ends of one of said parts being bent and the ends of both beveled,as described, to form seatings one for the other to lock the parts in position, substantially as set forth.

Signed at New York, in the county of New York and State of New York, this 9th day of il'larch, A. D. 1891.

NUMA .l. FELIX. Witnesses:

GEORGE 000K, WILLIAM GoEBEL. 

